jedis 出现java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.lang.Long

最新推荐文章于 2024-05-02 17:48:38 发布
转载 最新推荐文章于 2024-05-02 17:48:38 发布 · 2.3w 阅读 · 4

本文介绍了一种在使用Jedis客户端操作Redis时遇到的ClassCastException异常：ArrayList无法转换为Long类型的问题及其解决办法。

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java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.util.LinkedList，ArrayList是有
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虽然 ArrayList 和 LinkedList 都实现了 List 接口，但它们是两个不同的类，并且没有继承关系。你可以使用索引来访问特定位置的元素，也可以使用迭代器或增强的 for 循环来遍历列表，以保证按照插入的顺序访问元素。当你向 ArrayList 中添加元素时，它们将按照添加的顺序存储在内部数组中，并且在迭代时保持相同的顺序。是的，ArrayList 是有序的。需要注意的是，ArrayList 允许元素重复，并且它支持添加、删除和修改元素等操作，并会根据需要自动调整其大小。
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java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.lang.Long at redis.clients.jedis.Connection.getIntegerReply(Connection.java:222) at redis.clients.jedis.Jedis....
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关于一次java.lang.ClassCastException: java.util.ArrayList cannot be cast to [Ljava.lang.Object；的解决
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事实上，数组比如String[] 或者otherClass[] 可以被转成父类 Object[],但是ArrayList不可以。String[]里传的是一个数值，ArrayList里传的是一个对象。这就不得不说一下 String[] 和 ArrayList的区别。报错看起来是需要一个 [Ljava.lang.Object；
用这个方法，为什么会报class java.lang.String cannot be cast to class java.lang.Double
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我们正在讨论的是将`List, Double>>`转换为`Map, Double>`，但在转换过程中出现了`java.lang.ClassCastException: class java.lang.String cannot be cast to class java.lang.Double`错误。这个错误表明在转换过程...
redis内存的数据是[ "java.util.ArrayList", [ { "@class": "cn.com.aia.qam.process.entity.ProcessNode", "id": 100290, "createTime": [ "java.util.Date", 1754643776000 ], "creator": null, "updateTime": [ "java.util.Date", 1754643776000 ], "updator": null, "isDelete": "0", "definitionId": 100045, "defKey": "marketer-to-human", "nodeName": "开始", "nodeKey": "Event_4a700c0", "type": null, "expression": "", "attr": "bpmn:startEvent", "content": "", "version": 5, "sort": null, "description": "" }, { "@class": "cn.com.aia.qam.process.entity.ProcessNode", "id": 100291, "createTime": [ "java.util.Date", 1754643776000 ], "creator": null, "updateTime": [ "java.util.Date", 1754643776000 ], "updator": null, "isDelete": "0", "definitionId": 100045, "defKey": "marketer-to-human", "nodeName": "是否内勤", "nodeKey": "Gateway_2382101", "type": null, "expression": "", "attr": "bpmn:exclusiveGateway", "content": "", "version": 5, "sort": null, "description": "" }, { "@class": "cn.com.aia.qam.process.entity.ProcessNode", "id": 100292, "createTime": [ "java.util.Date", 1754643776000 ], "creator": null, "updateTime": [ "java.util.Date", 1754643776000 ], "updator": null, "isDelete": "0", "definitionId": 100045, "defKey": "marketer-to-human", "nodeName": "内勤回复", "nodeKey": "f3a6db67-061d-44e9-b079-e5e95210d23d", "type": "msg", "expression": "", "attr": "bpmn:reply", "content": "亲，人工服务仅面向营销员，内勤不适用哦。", "version": 5, "sort": null, "description": "" }, { "@class": "cn.com.aia.qam.process.entity.ProcessNode", "id": 100293, "createTime": [ "java.util.Date", 1754643776000 ], "creator": null, "updateTime": [ "java.util.Date", 1754643776000 ], "updator": null, "isDelete": "0", "definitionId": 100045, "defKey": "marketer-to-human", "nodeName": "参数设置", "nodeKey": "04b8dfd6-f8cc-43ba-9491-131a1eab2a65", "type": null, "expression": "marketerServiceHandle.marketerSetParams()", "attr": "bpmn:params", "content": "", "version": 5, "sort": null, "description": "" }, { "@class": "cn.com.aia.qam.process.entity.ProcessNode", "id": 100294, "createTime": [ "java.util.Date", 1754643776000 ], "creator": null, "updateTime": [ "java.util.Date", 1754643776000 ], "updator": null, "isDelete": "0", "definitionId": 100045, "defKey": "marketer-to-human", "nodeName": "是否黑名单", "nodeKey": "Gateway_308cddb", "type": null, "expression": "", "attr": "bpmn:exclusiveGateway", "content": "", "version": 5, "sort": null, "description": "" }, { "@class": "cn.com.aia.qam.process.entity.ProcessNode", "id": 100295, "createTime": [ "java.util.Date", 1754643776000 ], "creator": null, "updateTime": [ "java.util.Date", 1754643776000 ], "updator": null, "isDelete": "0", "definitionId": 100045, "defKey": "marketer-to-human", "nodeName": "黑名单提示", "nodeKey": "a043acce-e257-45e4-bdfe-236cee301b3b", "type": "msg", "expression": "marketerServiceHandle.blacklistHint()", "attr": "bpmn:reply", "content": "", "version": 5, "sort": null, "description": "" }, { "@class": "cn.com.aia.qam.process.entity.ProcessNode", "id": 100296, "createTime": [ "java.util.Date", 1754643776000 ], "creator": null, "updateTime": [ "java.util.Date", 1754643776000 ], "updator": null, "isDelete": "0", "definitionId": 100045, "defKey": "marketer-to-human", "nodeName": "是否服务时间内", "nodeKey": "Gateway_8e486d6", "type": null, "expression": "", "attr": "bpmn:exclusiveGateway", "content": "", "version": 5, "sort": null, "description": "" }, { "@class": "cn.com.aia.qam.process.entity.ProcessNode", "id": 100297, "createTime": [ "java.util.Date", 1754643776000 ], "creator": null, "updateTime": [ "java.util.Date", 1754643776000 ], "updator": null, "isDelete": "0", "definitionId": 100045, "defKey": "marketer-to-human", "nodeName": "不在服务时间提示", "nodeKey": "732b9ac8-9959-4306-bec6-251b699cff7a", "type": "cardMsg", "expression": "", "attr": "bpmn:reply", "content": "抱歉，当前不在服务时间。", "version": 5, "sort": null, "description": "" }, { "@class": "cn.com.aia.qam.process.entity.ProcessNode", "id": 100298, "createTime": [ "java.util.Date", 1754643776000 ], "creator": null, "updateTime": [ "java.util.Date", 1754643776000 ], "updator": null, "isDelete": "0", "definitionId": 100045, "defKey": "marketer-to-human", "nodeName": "挽留判断", "nodeKey": "Gateway_09607f0", "type": null, "expression": "", "attr": "bpmn:exclusiveGateway", "content": "", "version": 5, "sort": null, "description": "" }, { "@class": "cn.com.aia.qam.process.entity.ProcessNode", "id": 100299, "createTime": [ "java.util.Date", 1754643776000 ], "creator": null, "updateTime": [ "java.util.Date", 1754643776000 ], "updator": null, "isDelete": "0", "definitionId": 100045, "defKey": "marketer-to-human", "nodeName": "判断挽留次数", "nodeKey": "Gateway_2a5be63", "type": null, "expression": "", "attr": "bpmn:exclusiveGateway", "content": "", "version": 5, "sort": null, "description": "判断机器人会话次数" }, { "@class": "cn.com.aia.qam.process.entity.ProcessNode", "id": 100300, "createTime": [ "java.util.Date", 1754643776000 ], "creator": null, "updateTime": [ "java.util.Date", 1754643776000 ], "updator": null, "isDelete": "0", "definitionId": 100045, "defKey": "marketer-to-human", "nodeName": "挽留话术", "nodeKey": "97d23199-6f65-4329-9d3b-3d3808805f7a", "type": "retain", "expression": "marketerServiceHandle.retainWords()", "attr": "bpmn:reply", "content": "", "version": 5, "sort": null, "description": "" }, { "@class": "cn.com.aia.qam.process.entity.ProcessNode", "id": 100302, "createTime": [ "java.util.Date", 1754643776000 ], "creator": null, "updateTime": [ "java.util.Date", 1754643776000 ], "updator": null, "isDelete": "0", "definitionId": 100045, "defKey": "marketer-to-human", "nodeName": "获取菜单", "nodeKey": "ebc45842-95ad-4687-aab4-c202b454c78c", "type": "menu", "expression": "marketerServiceHandle.getMenu()", "attr": "bpmn:reply", "content": "", "version": 5, "sort": null, "description": "" }, { "@class": "cn.com.aia.qam.process.entity.ProcessNode", "id": 100303, "createTime": [ "java.util.Date", 1754643776000 ], "creator": null, "updateTime": [ "java.util.Date", 1754643776000 ], "updator": null, "isDelete": "0", "definitionId": 100045, "defKey": "marketer-to-human", "nodeName": "结束", "nodeKey": "Event_19c419b", "type": null, "expression": "", "attr": "bpmn:endEvent", "content": "", "version": 5, "sort": null, "description": "" } ] ]，如何获取这个list
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如果数据是JDK序列化格式（如`[ "java.util.ArrayList", [...] ]`），需手动反序列化： ```java try (Jedis jedis = new Jedis("localhost", 6379)) { byte[] data = jedis.get(("process:" + MARKETER_TO_HUMAN_...
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一、问题描述 21-05-25 14:39:34.110 ERROR [taskScheduler-12] o.s.s.s.TaskUtils$LoggingErrorHandler :95 - Unexpected error occurred in scheduled task java.lang.ClassCastException: class java.util.ArrayList cannot be cast to class java.lang.String (java.util.A
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完整报错： HTTP Status 500 – Internal Server Error</h1><hr class="line" /><p><b>Type</b> Exception Report</p><p><b>Message</b> Request processing fail...
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java.lang.ClassCastException: [B cannot be cast to java.lang.Long 是一个Java异常，表示无法将一个字节数组（[B）强制转换为Long类型。这个异常通常在Redis客户端的连接类（redis.clients.jedis.Connection）中...
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